TrueJournals

Tag: caller id

New Caller ID Development

by on May.24, 2009, under thoughts

I will continue to update this post throughout today and tomorrow with the latest developments of my caller ID research.

Sunday, 9:30 AM –I’ve discovered an interesting line while decompiling Comcast’s software (in an if statement which handles incoming messages):

(arg1.from[0].match(CALLER_ID_SERVICE_JID) || arg1.from[0].match(CALLER_ID_SERVICE_JID_TEST))

This means that comcast IS checking who the message is coming from. Although, they seem to do something else if it’s not from one of these two addresses. Also, what is CALLER_ID_SERVICE_JID_TEST? I’ll have to do some more exploring!

Sunday, 1:44 PM — Hmm… some interesting declarations:

public static const CALLER_ID_SERVICE_JID_TEST:String=”vismedia02@comcast.net”;
public static const CALLER_ID_SERVICE_JID:String=”callerid_alert@comcast.net”;

Monday, 9:19 AM — I’ve discovered an interesting URL in the code — machenmusik.com — it’s the package for the caller id decoding function (so, the project should be hosted there). However, it currently just gives a login prompt. Very strange. Anyway, I’m attempting to translate the caller ID decoding into python. I’ll let others translate it from there. We’ll see how this works out…

Monday, 3:18 PM — Well, after playing with the decompiled actionscript a bunch, I can’t get it to return any comprehensible output. The same goes for the python I translated. So, I’m kinda giving up right now due to lack of knowlege. If someone else would like to pick up where I’ve left off, contact me and I can send you what I have so far… It was worth a try, right?

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Comcast’s Caller ID

by on May.23, 2009, under thoughts

Comcast has recently added a new feature to their digital voice service: caller ID anywhere. Simply download a program on your computer, enter your comcast.net username and password, and you’ll get a small alert any time you get a call. The same system allows comcast to show caller ID alerts on your TV.

So, how does this work? Did comcast come up with some super-secret way to encode this data so no one but them can use it? Nope; they’re simply using XMPP.

For those unaware, XMPP is a very nice concept: an open messaging protocol. This means that companies don’t need to invent their own protocol, or shell out big bucks to use another protocol. Just grab a server and client, and you have an instant messaging system. XMPP is also designed to be expandible. Is there a feature you need that it’s missing? Just code it in, following the current specifications. The problem with this is that different clients can conform to different specifications for things that aren’t part of the official protocol, but that’s another discussion.

Comcast decided to not reinvent the wheel, and just use XMPP, with a little twist. If you already know a bit about XMPP, I’ll give you the stanza as a client receives it: (continue reading…)

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